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Microwave synthesis method of SOD zeolite membrane

A technology of microwave synthesis and zeolite membrane, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc. Film time, the effect of enhancing mechanical strength

Inactive Publication Date: 2015-04-29
DALIAN CITY SHAHEKOU DISTRICT SMALL MEDIUM & MICRO ENTERPRISES SERVICE CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fly ash contains a large amount of aluminosilicate glass, but [SiO4] 4- The degree of polymerization is high, the structure is dense, and the chemical properties are stable. Most of its pozzolanic activity is latent, and the speed of activity is very slow, which greatly limits the development and utilization of fly ash.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The microwave synthesis method of SOD zeolite membrane comprises the following steps:

[0020] ① Fly ash pretreatment: roast the fly ash at 800°C for 6 hours, then soak it in a mixed solution of sulfuric acid and nitric acid at a concentration ratio of 3mol / L: 2mol / L for 16 hours, dry it and grind it evenly;

[0021] ②Crystalization mother liquor: mix the fly ash prepared in step ① with silica sol, sodium hydroxide, sodium metaaluminate and deionized water by fly ash: SiO 2 :Al 2 o 3 :NaAlO 2 :H 2 O is 0.5g: 50mol: 2mol: 28mol: 5000mol and mix well;

[0022] ③Put the carrier into the crystallization mother liquor for 2 hours at 120°C for microwave synthesis; take it out after the reaction is complete, add the same amount of crystallization mother liquor for 80°C microwave synthesis for 4 hours; wash with deionized water and dry at 100°C.

[0023] The microwave synthesis method of the SOD zeolite membrane described in the present embodiment, the carrier is α-Al 2 o...

Embodiment 2

[0026] The microwave synthesis method of SOD zeolite membrane comprises the following steps:

[0027] ① Fly ash pretreatment: roast the fly ash at 850°C for 2 hours, then soak it in a mixed solution of sulfuric acid and nitric acid at a concentration ratio of 3mol / L: 2mol / L for 30 hours, dry it and grind it evenly;

[0028] ②Crystalization mother liquor: mix the fly ash prepared in step ① with silica sol, sodium hydroxide, sodium metaaluminate and deionized water by fly ash: SiO 2 :Al 2 o 3 :NaAlO 2 :H 2 O is 1.5g: 40mol: 8mol: 16mol: 800mol and mix well;

[0029] ③Put the carrier into the crystallization mother liquor and synthesize by microwave at 80°C for 8h; take it out after the reaction is completed; wash it with deionized water and dry it at 100°C.

[0030] In the microwave synthesis method of the SOD zeolite membrane described in this embodiment, the carrier is a mullite tube.

[0031] The microwave synthesis method of SOD zeolite membrane described in the presen...

Embodiment 3

[0033] The microwave synthesis method of SOD zeolite membrane comprises the following steps:

[0034] ① Fly ash pretreatment: roast the fly ash at 850°C for 2 hours, then soak it in a mixed solution of sulfuric acid and nitric acid at a concentration ratio of 3mol / L: 2mol / L for 20 hours, dry it and grind it evenly;

[0035] ②Crystalization mother liquor: mix the fly ash prepared in step ① with silica sol, sodium hydroxide, sodium metaaluminate and deionized water by fly ash: SiO 2 :Al 2 o 3 :NaAlO 2 :H 2 O is 1g: 40mol: 4mol: 20mol: 800mol and mix well;

[0036] ③Put the carrier into the crystallization mother liquor at 100°C for microwave synthesis for 4 hours; take it out after the reaction is complete, add the same amount of crystallization mother liquor for 60°C microwave synthesis for 2 hours; wash with deionized water and dry at 100°C.

[0037] In the microwave synthesis method of SOD zeolite membrane provided by the invention, the carrier is cordierite.

[0038] I...

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Abstract

The invention relates to a microwave synthesis method of an SOD zeolite membrane. The microwave synthesis method comprises the following steps: roasting coal ash at the temperature of 800-850 DEG C for 2-6h, then soaking in a mixed solution of sulfuric acid and nitric acid for 16-30h, and uniformly grinding after drying; uniformly mixing the coal ash with silica solution, sodium hydroxide, sodium metaaluminate and deionized water in a proportion of coal ash, SiO2, Al2O3, NaAlO2 to H2O being (0.5-1.5g):(40-50 mol):(2-8 mol):(16-28 mol):(500-800 mol) to prepare crystallization mother liquid; putting a carrier in the crystallization mother liquid, and carrying out microwave synthesis at the temperature of 80-120 DEG C for 2-8h; taking out after the reaction is completed, and supplementing the same amount of crystallization mother liquid at the temperature of 50-80 DEG C to carry out microwave synthesis for 0-4h; washing with deionized water, and drying at the temperature of 100 DEG C.

Description

technical field [0001] The invention belongs to the technical field of permeation and separation of inorganic materials, and relates to a preparation method of a zeolite molecular sieve membrane, in particular to a microwave synthesis method of an SOD zeolite membrane. Background technique [0002] Microwave is a kind of high-frequency electromagnetic radiation with 0.3-3GHz. Microwave technology is widely used in various research fields, such as biology and medicine. After the 1980s, microwave technology began to be applied in the field of chemistry, and in the 1990s, it was applied to the synthesis of zeolites. Compared with the traditional hydrothermal synthesis method, the microwave heating method has the advantages of short synthesis time, narrow force distribution, wide range of synthetic components and high purity. These advantages push scientists to explore its wider application in the synthesis of molecular sieve membranes. [0003] The cubic unit cell compositio...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00B01J19/12
Inventor 秦宏佳
Owner DALIAN CITY SHAHEKOU DISTRICT SMALL MEDIUM & MICRO ENTERPRISES SERVICE CENT
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